Mounting sheath structure for detonation pressure sensor in natural gas engine cylinder

Abstract

The utility model discloses a natural gas engine in-cylinder detonation pressure sensor installation sheath structure which comprises a cylinder cover and an installation assembly, the cylinder cover is in threaded connection with the installation assembly, the installation sheath assembly comprises a sheath, a pressing rod and a detonation pressure sensor, the sheath is in threaded connection with the cylinder cover, and the pressing rod is connected with the detonation pressure sensor. The surface of the pressing rod is in threaded connection with the inner wall of the sheath, the pressing rod is in clearance fit with the detonation pressure sensor, a mounting groove is formed in the top of the surface of the sheath, an O-shaped ring is mounted in the mounting groove, and the threaded end of the bottom of the sheath is sleeved with a gasket. According to the utility model, the original engine is slightly changed, and the detonation pressure condition in the cylinder can be monitored in real time on the basis of meeting the power performance of the original engine, so that the service life of the engine is effectively prolonged, and the safety in the use process is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of natural gas engines. Specifically, the utility model relates to an installation sheath structure for an in-cylinder explosion pressure sensor of a natural gas engine. Background Technique

[0002] An engine is a machine that can convert other forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. For example, an internal combustion engine usually converts chemical energy into mechanical energy. An engine is applicable to both power generating devices and the entire machine including the power device (such as a gasoline engine, an aeroengine). The engine was first born in the UK, and the concept of the engine also originated from English. Its original meaning refers to that kind of "mechanical device that generates power". Increasing the pressure in the cylinder of an internal combustion engine can improve the work capacity, but too high an in-cylinder explosion pressure brings greater mechanical load and thermal load, exceeding the limit that the current materials can bear. Accurately measuring the in-cylinder pressure and reducing the failure rate of engine parts have become one of the keys to the future development of internal combustion engines.

[0003] In various mechanical products, the exploration of in-cylinder explosion pressure measurement technology for engines is the most common thing. In the prior art, it is very difficult to solve the problem of in-cylinder explosion pressure measurement for engines, especially for natural gas engines. High rotational speed and high vibration are more likely to cause in-cylinder explosion pressure. The influence of in-cylinder explosion pressure of an engine is mainly reflected in power performance, fuel economy, emission standards, starting performance, and the life and safety of the engine. Content of the Utility Model

[0004] The utility model provides an installation sheath structure for an in-cylinder explosion pressure sensor of a natural gas engine, which solves the problems raised in the above background technique.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows: an installation sheath structure for an in-cylinder explosion pressure sensor of a natural gas engine, including a cylinder head and an installation assembly. The cylinder head is threadedly connected with the installation assembly. The installation sheath assembly includes a sheath, a pressure rod, and an explosion pressure sensor. The sheath is threadedly connected with the cylinder head. The surface of the pressure rod is threadedly connected with the inner wall of the sheath. There is a clearance fit between the pressure rod and the explosion pressure sensor.

[0006] Preferably, an installation groove is opened at the top of the surface of the sheath, and an O-ring is installed inside the installation groove.

[0007] Preferably, a gasket is sleeved on the threaded end at the bottom of the sheath.

[0008] The beneficial effects of adopting the above technical solutions are:

[0009] The utility model has relatively little modification to the original engine. On the basis of meeting the power performance of the original engine, it can monitor the in-cylinder explosion pressure in real time, thereby effectively improving the service life of the engine of the utility model and ensuring the safety during use. Description of the Drawings

[0010] Figure 1 is the structural assembly view of the utility model;

[0011] Figure 2 is the cross-sectional view of the structural sheath of the utility model;

[0012] Figure 3 is the cross-sectional view of the structural pressure rod of the utility model;

[0013] Figure 4 is the cross-sectional view of the structural explosion pressure sensor of the utility model;

[0014] Wherein:

[0015] 1. Cylinder head; 2. Installation assembly; 21. Sheath; 22. Pressure rod; 23. Explosion pressure sensor; 24. Installation groove; 25. O-ring; 26. Gasket. Detailed Embodiment

[0016] The following is a further detailed description of the specific embodiments of the present utility model by referring to the drawings and describing the embodiments, aiming to help those skilled in the art have a more complete, accurate and in-depth understanding of the concept and technical solution of the present utility model and facilitate its implementation.

[0017] As Figures 1 to 4 shown, the present utility model is a structure of an installation sheath for an in-cylinder explosion pressure sensor of a natural gas engine, which has relatively little modification to the original engine. On the basis of meeting the power performance of the original engine, it can monitor the in-cylinder explosion pressure in real time, thereby effectively improving the service life of the engine of the utility model and ensuring the safety during use.

[0018] Specifically, as Figure 1 shown, it includes a cylinder head 1 and an installation assembly 2. The cylinder head 1 is threadedly connected to the installation assembly 2. The installation sheath assembly 2 includes a sheath 21, a pressure rod 22 and an explosion pressure sensor 23. The sheath 21 is threadedly connected to the cylinder head 1. The surface of the pressure rod 22 is threadedly connected to the inner wall of the sheath 21. There is a clearance fit between the pressure rod 22 and the explosion pressure sensor 23.

[0019] An installation groove 24 is opened at the top of the surface of the sheath 21, and an O-ring 25 is installed inside the installation groove 24.

[0020] A gasket 26 is sleeved on the threaded end at the bottom of the sheath 21.

[0021] The following describes the specific working mode with specific embodiments: Embodiment 1

[0022] As Figure 2 shown, the a part of the sheath 21 is threadedly connected to the pressure rod 22, the thread size L2 is M10X1, and the length size L1 = 30 mm;

[0023] The diameter size D1 = 9 mm, and it has a clearance fit with the pressure rod 2.

[0024] The diameter size D2 = 8.5 mm, and it has a clearance fit with the explosion pressure sensor 3, L3 = 23 mm, L4 = 11 mm;

[0025] The b part of the sheath 21 is threadedly connected to the cylinder head 4, the thread size L6 is M12X1.25, and the thread length L5 = 7.5 mm;

[0026] As Figure 3 shown, the d part of the pressure rod 22 is threadedly connected to the a part of the sheath 21, the thread size L9 is M10X1; the thread length L8 = 15 mm;

[0027] The c part of the pressure rod 22 has a clearance fit with the explosion pressure sensor 23, and presses the explosion pressure sensor 23 against the step, the diameter size D3 = 7.5 mm, L7 = 5 mm;

[0028] As Figure 4 shown, the e part of the explosion pressure sensor 23 has a clearance fit with the sheath 1, the diameter size D5 = 8.5 mm; the f part of the explosion pressure sensor 23 has a clearance fit with the cylinder head 4, the diameter size D3 = 6.2 mm.

[0029] The above has made an exemplary description of the present invention in combination with the drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present invention; or without improvement, the above concept and technical solution of the present invention are directly applied to other occasions, all are within the protection scope of the present invention.

Claims

1. A structure of an installation sheath for an in-cylinder explosion pressure sensor of a natural gas engine, comprising a cylinder head (1) and an installation assembly (2), characterized in that: The cylinder head (1) is threadedly connected to the mounting assembly (2). The mounting assembly (2) includes a sheath (21), a pressure rod (22), and a detonation pressure sensor (23). The sheath (21) is threadedly connected to the cylinder head (1). The surface of the pressure rod (22) is threadedly connected to the inner wall of the sheath (21). There is a clearance fit between the pressure rod (22) and the detonation pressure sensor (23).

2. The installation sheath structure of an in-cylinder explosion pressure sensor for a natural gas engine according to claim 1, wherein: An installation groove (24) is formed at the top of the surface of the sheath (21), and an O-ring (25) is installed inside the installation groove (24).

3. A structure of an installation sheath for an in-cylinder explosion pressure sensor of a natural gas engine according to claim 1, characterized in that: A gasket (26) is sleeved on the threaded end at the bottom of the sheath (21).

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